/*
 *    Copyright 2022 jacky4631 shen ji email:121659050@qq.com
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.dataoke.shoppingguide.app773026.activity.introduce;

import android.content.Context;
import android.content.res.TypedArray;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import android.util.AttributeSet;
import android.widget.FrameLayout;

import com.dataoke.shoppingguide.app773026.R;

/**
 * 按缩放比显示的布局
 * @author: shen ji
 * @date: 2022/3/15
 * @email: 121659050@qq.com
 * @wechat: jacky4631
 */
public class RatioLayout extends FrameLayout {
    private float mRatio = 1.0f;
    private int mFlag;
    private static final int FLAG_WIDTH = 1;
    private static final int FLAG_HEIGHT = 2;
    private int mRatioHeight;

    public RatioLayout(@NonNull Context context) {
        this(context, null);
    }

    public RatioLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.RatioLayout);
        mRatio = array.getFloat(R.styleable.RatioLayout_layout_ratio, 1.0f);
        mFlag = array.getInt(R.styleable.RatioLayout_ratio_flag, FLAG_WIDTH);
        array.recycle();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int width;
        int height;
        if (mFlag == FLAG_HEIGHT) {
            height = MeasureSpec.getSize(heightMeasureSpec);
            width = (int) ((float) height * mRatio);
            widthMeasureSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
        } else {
            width = MeasureSpec.getSize(widthMeasureSpec);
            height = (int) ((float) width / mRatio);
            mRatioHeight = height;
            heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    public int getRatioHeight() {
        return mRatioHeight;
    }
}
